#include <uapi/linux/bpf.h>
#include <uapi/linux/if_ether.h>
#include <uapi/linux/if_packet.h>
#include <uapi/linux/ip.h>
#include <bpf/bpf_helpers.h>
#include "bpf_legacy.h"

struct {
        __uint(type, BPF_MAP_TYPE_ARRAY);
        __type(key, u32);
        __type(value, long);
        __uint(max_entries, 256);
} my_map SEC(".maps");

SEC("socket1")
int bpf_prog1(struct __sk_buff *skb)
{
        int index = load_byte(skb, ETH_HLEN + offsetof(struct iphdr, protocol));
        long *value;

        if (skb->pkt_type != PACKET_OUTGOING)
                return 0;

        value = bpf_map_lookup_elem(&my_map, &index);
        if (value)
                __sync_fetch_and_add(value, skb->len);

        return 0;
}
char _license[] SEC("license") = "GPL";